647364567 has 4 divisors (see below), whose sum is σ = 863152760. Its totient is φ = 431576376.

The previous prime is 647364563. The next prime is 647364583. The reversal of 647364567 is 765463746.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 647364567 - 2² = 647364563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647364563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107894092 + ... + 107894097.

It is an arithmetic number, because the mean of its divisors is an integer number (215788190).

Almost surely, 2^647364567 is an apocalyptic number.

647364567 is a deficient number, since it is larger than the sum of its proper divisors (215788193).

647364567 is a wasteful number, since it uses less digits than its factorization.

647364567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215788192.

The product of its digits is 2540160, while the sum is 48.

The square root of 647364567 is about 25443.3599785877. The cubic root of 647364567 is about 865.0667938220.

The spelling of 647364567 in words is "six hundred forty-seven million, three hundred sixty-four thousand, five hundred sixty-seven".